border and north and autumn taking over there and temperatures in the 20s at this hour in northern canada. the shorter days taking their toll on temperatures and giving rise to the cooling there which starts setting up more and more powerful jet streams and that's united states weather of autumn and winter turns more active faster steering winds and forces in the atmosphere to get storms going. 70 in chicago, 61 up the lake at green bay and rhinelander at 49. it's 47 in duluth. many areas registering a temperature drop over the last 24 hours with east winds blowing here at 13. humidity 49% and water at 68 degrees. and the pollen numbers are down. mold spores a moderate ragweed and weed. loyola gottlieb hospital and dr. joseph lea and his staff. here is what we were talking about. powerful jet stream. look that the batch of winds right there. that white area, that's strong band of winds. when the winds strengthen like that, that's a sign that temperature differentials increasing because cold air is coming south. what it does is this fast west to east flow takes the core of the cool air and